It's also handy on laser cutters, where you may want to finely adjust the position of a material with respective to the beam waist. You can accomplish similar results by using extrusion multipler and first layer width, but I'd argue that's not best practice. For example, you may find that sometimes the first layer segments aren't connecting. It would be a pain to adjust the bed for that every time or the actual position of the limit switch-cannot reliably move in <1 mm increments anyways. The z-offset is useful because you may find that with different materials and different bed adhesion methods, you'll need to make some fine adjustments. Same with a negative offset, except you will hit the limit switch and/or bed, so that's the practical limit for the negative. If you have any z-offset, it will be added, so if you had +0.1 mm z-offset, you'd end up 0.5 mm above the bed. ![]() So the actual nozzle height is 0.4 mm (assuming the card was 0.2 mm thick) above the bed. 0.2 mm) but there's an additional height because of the gap between the bed and the nozzle when you used the business card for leveling. The head moves up based on the layer height (e.g. Any z-offset you have is ignored here.Ģ) The printer moves to print the first layer. The attached shows the Home (14mm to left of bed) and the Center of the bed where prints get centered.Īdditional considerations for setting ToolHead Offsets and which Offset panel (the Process or Preferences) input fields to use require some homework and playing around to fully understand.ġ) When you home the z-axis, the limit switch will engage twice then the printer will stop on the switch, that marks the HOME, or zero position. But, Offsets are primarily used for machines where the extruder Homes off the bed area (such as to a Wiper and Debris bin).Īs an Example: I installed V6 hot-ends that put the nozzle 14mm to left of the bed when Homed. The Centering of a 'part' is based on the machine dimensions as well as Offsets. If needing to Center a part on the bed, ensure you have the correct bed/machine dimensions setup. When you Home the machine, the nozzle should barely touch a piece of paper on the bed - a slight dragging is the 'sweet spot' for getting an excellent bottom layer on the bed (glass) side. On most machines, Z is adjusted via adjusting the Z-axis limit switch. Not generally used for centering or adjusting Z. Or is there a function in mach that does that anyway? Can't test this for a few days now, which bugs me.Offsets are used to primarily to address Hardware setup. Z = GetUserDro(1100) 'get value from my DROĪm I right in thinking that this would move my Z axis until the switch trips, then Z stops moving, and mach sets the current Z position as Z0? G28.1 'only Z would be enabled for this in my soft limits config? I may be misunderstanding what the OP wanted but I think in order to do what I want, I would need to rewrite as:. Z=GetUserDro(1100) 'get the value of your metal thickness from the dro.Ĭode "G0 Z" & z 'This moves to the new Z position that you put in the dro. Poppabear suggested a user defined DRO, which passes a value to a macro:. I looked through a post from 2007 entitled 'Gcode to re-zero Z axis', which appears to be about the same kind of thing. ![]() At the end of the file, the next file will be called and run automatically from within the current file, and so a new Z0 position will need to be found. I have code that moves my Z axis until a moveable limit switch is tripped (G00 Z40000 ie a figure so large that it ensures the switch will always be tripped at some point.) When this happens, I want the machine to treat this position as Z0, until the end of the file. I may be over complicating this I think what I want to do is to zero my Z axis in code.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |